Product Details: The OTR 16.5" x 5" AFM Vortex® Unlimited Outboard Mount Brake Drum ensures Expertise Built In™, featuring advanced brake drum technology to run 10% cooler than standard brake drums. The patented design employs external cooling ribs that conduct heat away from the brake surface for superior heat dissipation. A patented wear indicator gives you a quick visual reference to take the guess work out of repairs to save maintenance cost. This brake drum showcases precise cast holes that provide the same fit, function, and form as typical drilled holes. Experience reduced decentralization risk, as well as resistance to heat checking and brake fade. The OTR brake drum also boasts cutting edge technology, providing your rig with the stopping distance your truck requires. Being designed, cast, and machined to all applicable industry standards, this heavy duty brake drum replacement restores your semi truck’s brake assembly to its original working order. FleetPride is your First Click in Heavy Duty®.